Firewall (computing) - Wikipedia
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier...
10 Best Free Firewall Programs (Updated March 2021)
Windows does have a firewall built-in, but did you know there are other options? Here's a list of the best free firewall programs we could find. A list of the best free firewall programs for Windows.
Безопасность - Firewalls
Windows Firewall Notifier 2.0 beta 3. RusRoute firewall 2.1.3.
What Is a Firewall? - Cisco
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.